Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 36: HK+T Joint Session VI: Radiation Damage

HK 36.3: Vortrag

Mittwoch, 29. März 2017, 17:15–17:30, F 234

Studies of radiation field impact on microstrip sensors for the CBM Silicon Tracking System — •Ievgeniia Momot^1,2,3, Olga Bertini², Maksym Teklishyn^3,4, Anton Lymanets^2,3, Hanna Malygina^1,2,3, Johann Heuser², and Christian Sturm² for the CBM collaboration — ¹Goethe-Universität, Frankfurt — ²GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — ³KINR, Kyiv Institute for Nuclear Research, Kyiv, Ukraine — ⁴FAIR, Facility for Antiproton and Ion Research, Darmstadt, Germany

The Silicon Tracking System (STS) is the main tracking detector of CBM experiment. Located in the dipole magnet, reconstructs tracks and determines momentum of charged particles originating from beam-target interactions. The response of double-sided silicon micro-strip sensors to hits is very depended on the radiation load on the detector, which is expected to reach 10¹⁴ 1 MeV n_eq/cm². It is vital to maintain signal-to-noise ratio at the level of ≈ 10 to keep 98% hit reconstruction efficiency after irradiation up to the CBM lifetime dose. Results of testing newest prototypes of sensors from two different vendors to fluences between 10¹³ and 2×10¹⁴ n_eq/cm² will be reviewed. Thus the total effect of the different radiation doses on the signal-to-noise ratio will be presented.
Supported by HIC for FAIR and HGS-HIRe.